Code scanning method of double-camera code scanning engine

Abstract

According to the code scanning method of the double-camera code scanning engine provided by the invention, the code scanning engine can give consideration to both long-distance code scanning and short-distance code scanning by setting the first camera unit and the second camera unit with different focal lengths, and meanwhile, the code scanning engine also has incomparable advantages in the aspects of cost, size and durability compared with a zoom engine; by arranging the control signal switching unit and the data signal switching unit, the system can be compatible with an existing code scanning engine, other signals do not need to be additionally added, and the compatibility and the cost are optimal; according to the code scanning method, the ambiguity of the bar code images acquired by the two camera units is compared, and the bar code image with low ambiguity is transmitted to the decoding unit for decoding, so that the decoding effect is ensured.

Description

technical field [0001] The invention relates to the technical field of barcode scanning, in particular to a barcode scanning method of a dual-camera barcode scanning engine. Background technique [0002] At present, barcode scanning devices are widely used in supermarkets, logistics, industrial identification and other fields. The implementation of barcode scanning technology is generally based on digital image acquisition and processing. The barcode image of the marked object is collected through a digital camera, and after image processing and decoding, it is recognized as a digital signal that can be directly accepted by the computer. [0003] In some industrial applications, when a user uses a barcode scanner or PDA to input barcode data, some workstations need to input long-distance barcodes, some workstations need to input short-range barcodes, and even some workstations have both Need to scan the remote and also need to scan the near-end barcode. Most of the existin...

AI Technical Summary

Problems solved by technology

Most of the existing mid-to-low-end scanning engines use fixed-focus optical lenses, and the optical depth of field is relatively short. They are generally configured with different product SKUs according to the usage scenarios, such as HD (high definition) for short-range, and ER for long-range. / XR (extended range) and SR (standard range) that specialize in medium and short distances. Since different SKUs of mid- and low-end fixed-focus lenses have different optical clarity ranges, it is impossible to take into account both long-distance and medium-to-near distance scanning; while high-end scanning The code engine will use a zoom lens to dynamically adjust the focal length to see the barcode at the far or near end. However, due to the size, price, and zoom time of the zoom lens, the durability of the lens is much worse than that of the fixed-focus lens.

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